<?php

/*
 * Copyright 2008 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#namespace tehframework\annotations;

interface Annotation
{
	const TARGET_CLASS       = 1;
	const TARGET_PROPERTY    = 2;
	const TARGET_CONSTRUCTOR = 4;
	const TARGET_METHOD      = 8;
	const TARGET_FUNCTION    = 16;
	const TARGET_PARAMETER   = 32;
	const TARGET_ALL         = 63;
	
	/**
	 * Returns a bitwise flag of targets which can be annotated
	 * with this annotation.
	 *
	 * @return int
	 *         A bitwise flag of annotation's targets.
	 */
	function getAnnotationTargets();
	
	/**
	 * Determines whether annotation can be used multiple times
	 * on a single target.
	 * 
	 * @return bool
	 *         TRUE if annotation can be used multiple times on a single element;
	 *         FALSE otherwise.
	 */
	function allowsMultiple();
}